--- a/taskcluster/taskgraph/transforms/task.py
+++ b/taskcluster/taskgraph/transforms/task.py
@@ -537,19 +537,19 @@ def check_v2_routes():
     with open("testing/mozharness/configs/routes.json", "rb") as f:
         routes_json = json.load(f)
 
     # we only deal with the 'routes' key here
     routes = routes_json['routes']
 
     # we use different variables than mozharness
     for mh, tg in [
-        ('{index}', 'index'),
-        ('{build_product}', '{product}'),
-        ('{build_name}-{build_type}', '{job-name-gecko-v2}'),
-        ('{year}.{month}.{day}.{pushdate}', '{pushdate_long}')]:
+            ('{index}', 'index'),
+            ('{build_product}', '{product}'),
+            ('{build_name}-{build_type}', '{job-name-gecko-v2}'),
+            ('{year}.{month}.{day}.{pushdate}', '{pushdate_long}')]:
         routes = [r.replace(mh, tg) for r in routes]
 
     if sorted(routes) != sorted(V2_ROUTE_TEMPLATES):
         raise Exception("V2_ROUTE_TEMPLATES does not match Mozharness's routes.json: "
                         "%s vs %s" % (V2_ROUTE_TEMPLATES, routes))
 
 check_v2_routes()